Simulation of Nonstationary Processes Based on Hilbert Spectrum and Random Phase

摘要：

Simulation of nonstationary processes has become an indispensable tool in engineering. A new method of simulation of nonstationary random processes is presented based on the orthogonal HHT spectra of sample observations. It takes advantage of orthogonal EMD, the instantaneous frequency, amplitude of the Hilbert transform and independent random phase angle, thus overcoming difficulties in the estimation of the frequency modulation and interdependence of frequency and amplitude modulation functions faced by most currently available methods. The new method extract and preserve the true physical features of the process. The examples of earthquake ground motion and subway vibration, as e low frequency and high frequency nonstationary processesses, were simulated in the paper. The time history of sample, Fourier amplitude spectrum of sample and response spectra of sample compare well with those of the records. The methods has great potential for engineering applications when dealing with nonstationary, nonlinear random peocesses.

关键词： orthogonal Hilbert-Huang transform Earthquake ground motion subway vibration nonstationary random processes simulation

作者: HU Can-yang XIONG Qin-qin

作者单位: Jiangsu Key Laboratory of Public Project Audit, Nanjing Audit University, Nanjing,China

会议类型: 国际会议

会议名称: 2011 4th International Congress on Image and Signal Processing(第四届图像与信号处理国际学术会议 CISP 2011)

会议地点: 上海

会议语种:英文

页码: 2397-2401

在线出版日期: 2011-10-15（万方平台首次上网日期，不代表论文的发表时间）